content: /*
   * Copyright 2017 David Karnok
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package hu.akarnokd.reactive4javaflow.impl.operators;
  
  import hu.akarnokd.reactive4javaflow.*;
  import hu.akarnokd.reactive4javaflow.functionals.AutoDisposable;
  import hu.akarnokd.reactive4javaflow.impl.*;
  import hu.akarnokd.reactive4javaflow.processors.CachingProcessor;
  
  import java.lang.invoke.*;
  import java.util.concurrent.*;
  import java.util.function.Consumer;
  
  public final class ConnectableFolyamReplaySizeAndTimeBound<T> extends ConnectableFolyam<T> {
  
      final Folyam<T> source;
  
      final int maxSize;
  
      final long timeout;
  
      final TimeUnit unit;
  
      final SchedulerService executor;
  
      CachingProcessor<T> processor;
      static final VarHandle PROCESSOR = VH.find(MethodHandles.lookup(), ConnectableFolyamReplaySizeAndTimeBound.class, "processor", CachingProcessor.class);
  
      static final Flow.Subscription CONNECT = new BooleanSubscription();
  
      public ConnectableFolyamReplaySizeAndTimeBound(Folyam<T> source, int maxSize, long timeout, TimeUnit unit, SchedulerService executor) {
          this.source = source;
          this.maxSize = maxSize;
          this.timeout = timeout;
          this.unit = unit;
          this.executor = executor;
      }
  
      @Override
      protected AutoDisposable connectActual(Consumer<? super AutoDisposable> connectionHandler) {
          for (; ; ) {
              CachingProcessor<T> mp = (CachingProcessor<T>) PROCESSOR.getAcquire(this);
              if (mp == null) {
                  mp = new CachingProcessor<>(maxSize, timeout, unit, executor);
                  if (!PROCESSOR.compareAndSet(this, null, mp)) {
                      continue;
                  }
              }
              boolean b = mp.prepare(CONNECT);
              connectionHandler.accept(mp);
              if (b) {
                  source.subscribe(mp);
              }
  
              return mp;
          }
      }
  
      @Override
      public void reset() {
          CachingProcessor<T> mp = (CachingProcessor<T>) PROCESSOR.getAcquire(this);
          if (mp != null) {
              if (mp.hasTerminated()) {
                  PROCESSOR.compareAndSet(this, mp, null);
              }
          }
      }
  
      @Override
      protected void subscribeActual(FolyamSubscriber<? super T> s) {
          for (; ; ) {
              CachingProcessor<T> mp = (CachingProcessor<T>) PROCESSOR.getAcquire(this);
              if (mp == null) {
                  mp = new CachingProcessor<>(maxSize, timeout, unit, executor);
                  if (!PROCESSOR.compareAndSet(this, null, mp)) {
                      continue;
                  }
              }
              mp.subscribe(s);
              break;
          }
      }
  
  }